<template>
  <div class="app-container">
    <!-- 顶部 Header 区域 -->
    <mt-header fixed title="黑马程序员-->Vue项目">
      <span slot="left" @click="goBack" v-show="flag">
        <mt-button icon="back">返回</mt-button>
      </span>
    </mt-header>

    <!-- 中间的 路由 router-view 区域 -->
	<transition>
		<router-view></router-view>
	</transition>
	

    <!-- 底部 -->
    <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-abc" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-abc" to="/member">
				<span class="mui-icon mui-icon-email"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-abc" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
					<span class="mui-badge" id="badge">{{this.$store.getters.getAllCount}}</span>
				</span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-abc" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
		
  </div>
</template>
    
<script>
export default {
  data() {
    return {
      flag: false
    }
  },
  created(){
    this.flag = this.$route.path === '/home' ? false : true
  },
  methods: {
    // 点击后退
    goBack() {
      this.$router.go(-1);
    }
  },
  watch: {
    "$route.path": function (newVal) {
       if(newVal === "/home"){
         this.flag = false
       }else{
         this.flag = true
       }
    }
  }
}
</script>

<style lang="scss" scoped>
.mint-header{
  z-index: 99;
}
.app-container{
  padding-top: 40px;
  padding-bottom: 50px;
// 解决动画切换时，出现导航条的情况
  overflow-x: hidden;
}

// 组件切换时的样式
.v-enter{
	opacity: 0;
	transform: translateX(100%);
}
.v-leave-to{
	opacity: 0;
	transform: translateX(-100%);
	position: absolute;
}
.v-enter-active,
.v-leave-active{
	transition: all 0.5s ease;
}
// 更改 .mui-tab-item 为 .mui-tab-item-abc
.mui-bar-tab .mui-tab-item-abc {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}
.mui-bar-tab .mui-tab-item-abc.mui-active {
    color: #007aff;
}
.mui-bar-tab .mui-tab-item-abc .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}
.mui-bar-tab .mui-tab-item-abc .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>